Ignition starting device for ignition magnetos



Wm. 2n, 115923..

1,445,6m v. BOSCATO IGNITION STARTING DEVICE FOR IGNITION MAGNETOS Filed Apr. 24, 1922 subj Ztth v'rrronro nosonrc, U1?lJ HtNO JMEARIIiTAQ tram.

renrrron Application filed s in lt '0 i or Z! ro/tom may camera; .l-l

. thus to suddenly accelerate the speed of the magneto to obtain an effective spark.

vice.

The annexed drawing illustrates one exccution term of the invention by way of example.

Fig. 1 is an axial section through the delFig. 2 is a section on the line AB ot' lilg.

f vice cover.

. into asleeve -jembracing the hub -Z1 liig". 3 is a view of the inside oft the delTigQ l shows the box end of the device.

an {LX131 section through the said Figsfi and 7 are front views of the stop elements and weights working by centrifu- 1 and provided with opposed projections .g/-.-. The connection between the lid -0- an the box end -eis ensured by a spring, Whose one end is secured to the lid -0 at Z- and whose other endis secured in a hole formed in the sleeve -f. The box lid --cis provided with two slots -mdiametrically opposite one another and formedmnear the lid base. Opposed stop elements it and n are inovably mount were. serial to, teases.

ed in the slots in and are providedu with curved shank portions tenth in opposit the sleeve 7'' and terminate in inwardly directed lugs g and (1. Curved weights 3? and n are secured to the lugp'edterininals [of the shai spaced om the stop elements it, n.

.llach weight lies on the side of the sleeve 2" opposite the stop" eh t: with uvhich it is connects o n-11d .0 which err;

m through its slot. The ends r and r of the weights p and p constitute stops whichongage each other" direct me, ciartially about M ii o and o and. extend to points.

.iits. the. outward.

when the two stop elements move inwardly.

.-s' and -t are two projections secured tothe lips oi the cover -o and of the box end -e. in. order to limit the amount of rotation of the said cover -cwhen the tripping occurs. 'uis a stationary stop designed to cooperate with the tripping mechanism.

The device worksiu the ttollowing manner:

When theengine is running normally, the no stop elements owing to the centrifugal force setup by their weights take a position in which the ends r and r lie in abutment, and consequently the stop elements --n-,'

-n do not project out of the slots -'mr-.

Vtith the stop elements so disposed the lid may -t'reely rotate with the box end --e-- which latter carries the lid --c along with it owingto the pressure exerted by thspring z'-. j

When the engine is at rest or is running the stop eleinent n with its weight y0- at the top falls by gravity to the position shown in Fig. 2. The stop element it pro jects through the slot 11?. formed in the cylindrical portion oi the lid 0 as shown in Fig. 1, and as a consequence during the rotation of the engine the rotation of this part a is hindered by the stop a and the lid 0 cannot revolve along with the box end 0. The spring is therefore loaded. in tension until one of the projections oi the sleeve 7" strikes against the stop 9 and causes the latter to move so that n is released from the catch or stop u. The spring; t' now sharply pulls the lid 0, and along with it the may; neto spindle a, into rotation at a suiiicient speed for the spark to pump. In order to prevent the lid 0 flying beyond. the desired convenient limit, the lid 0 is provided with at lowspeed during the starting period, a

a stop s and the box end is provided with a stop If; when the two stops strike against each other, a further undue advance of c relatively to e is made impossible.

The acceleration of the rotation speed sets up suiticient centrifugal force in the Weights p, p to cause the stop elements 12, n to be drawn inside and thus to permit the free rotation of the lid 0 and of the magneto spindle a.

Having now particularly deseribed and ascertained the nature of my said invention and in What mannerthe same is to be performed, I declare that What I claim is:

A box including an end member and a lid member provided With a flange engaging the end member and having opposed slots therein, a hub member carried by the lid member adapted to engage the spindle of a magneto, means rotatably supporting the end member on said hub, the spring means normally maintaining the id. and end members in predetermined angular relatioin a relatively stationary stop, opposed stop elements slidable tlCLlllh f through the slots in the flange of the lid member and rotatable with the latter, oppositely curved shank members carried by the stop elements and embracing dimnetricall opposed portions of the hub and curved weights secured to said shank members, each curved weight embracing a portion of the hub opposite the stop element connected therewith whereby to limit the outward movement of said stop elements.

Signed this nst-day of lvlarch, 1})22.

VITTORIQ BOW A TO Witnesses VVILLIAu P. SHOGKLEY. AornLLn Vrcnnns. 

